13-letter words containing a, n, d, f, o
- under pain of — physical suffering or distress, as due to injury, illness, etc.
- untransformed — not transformed; not having been transformed
- waterflooding — (in oil, gas, or petroleum production) the practice of injecting water to maintain pressure in a reservoir and to drive the oil, etc towards the production wells
- wolffian body — the mesonephros.
- wolffian duct — a duct, draining the mesonephros of the embryo, that becomes the vas deferens in males and vestigial in females.
- woodcraftsman — a person who is skilled in woodcraft.
- word deafness — inability to comprehend the meanings of words though they are heard, caused by lesions of the auditory center of the brain.